Belt-slitting machine



ou. 27,1925. l 1,558,860

A. J. GERRARD AL BELT SLITTING MACHINE med April 2s. i924 2 sheets-sheet. 2

AND Alle darmm) LEROY FHINTZ,

and! nm,

Patented oct. `27', 1925.

ALEC J.Y GERRABD'AND LEROY F.

.BELTLSLITTNGgnAcl-IINE.

l Appneatienlee Aii1j 2e,1924.fsemaine. 709,798. i

Be it known thatfwe, Ax-JECMJ-v GERARD andi LEROY F. HiNTz, respectively a s ubJeet of the Kingof Greatritainjand a citizen of the United States, r residing at :Chica-go, vinthe Y county O'Gook and State of Illinois, have invented certainne'wfand useful Improvement-s in Belt-Slitting Mae-limes; and they do .hereby fde'elar'e .the following toi be ajfull,

t to' Which it appertains tomake anduse theV` y rigidly VV'secured tothe lug v2 andk the, frame clear, and exact desoriptionof the invention, sueh as Will enable others skilled in theart Same. J

This ,invention relates tolabelt stripping or slit-ting machine and has 'for its object to provide a devlce of thisohafraetfer which will be 's11nple lin construction, -comparatively -mexpensive to manufaeturmand morei-efhoi'ent.l

inuse.- than those Whiehfhavebeen heretofore proposed. ,4 7 1 VithatheseV and Aother' Objets in vieWfthe invention Consists in .the novel details l0i construction and combinations of parts as.

Will bemorerfully.'hereafter disclosed and partioularly pointed out in the Claims.

lReferring `to the vaeoompanying dra-wings,

forming a part .of this speoiiioation in which Vlike numerals vdesignate lilre'part'sin all the 'i Vviews, 3 Fig. 11s a machine partlyv in Ysection front elevational .View of the tion ofthe arrows'.

In the drawings, 1 indicates any' suitable.-

base havin'f'at one end anu Wardl extend.-

ing lugip'o'rtion" 2 and provided atits other end With a jvertieally disposed frame mem- -ber Shavingy an ov'erhangmg arm 4. lThe lug 2 and thevertical frame 3 form bearings for the shaft `6 Which is provided Wit-h the gear 7 and the operating' handlev 8 at one end. Attheother' end of shaft, 6 is mounted a -knurl'ed yfeeding roll 10.

Disposed above the feed roll 10 and in the same plane therewith is vva second knurled feed roll 11 Vrigidly secured on the 'endof Vshaft 12 provided at its 'opposite end with a gear. v13l meshing in thedriying 'gear 7. Be-

"overhanging arm 4. .Y Agportionof this-bore '1s threaded 'tov accommodate the hand screw '1 8 by meansof which tension may be placed ber 16 adapted to1 slidein the bore 17 of theff upon the spring 19 interposed between thev guidefmember 16v and the hand sereiv 18,.'a1l asf'wvilLbe elearffrom FigureL Disposed lbetween thesha-fts 6 and 12 and ymember 3 isa iatplate like memberor table 2Q providedwith an opening therein through which protrudes the lower feed roll 10E and a cutter 21t'hei said cutter being rigidly sef guide member 26 provided with the upeured tothe lug 2; asshown. The `platef20 'is alsofprovided With the slit.v 25 'Within 1; which slides the adjustable straight-edge or turned edge27fagainst, Whieh` the belt ltobe trimmed isYV positioned. yOneend of the 1iiem adapted to slide alo-ng the front-'edge of the plate 2 0V and also to prevent: theV main body' Y portion of the straightledg'e member 26 from" Wabbling Whilefthe belt isbeing trimmed.

A section 29 ofthe` plate 20,i's` upturned to form aguard'for the meshing gear/sg( and e' plate` 2O may be providedwith scale markings 30 adjacent the slit 25 vpermitting the straight edge k26to` bequickly set as clersired 'and thereupon lclamped irmlyto .the

plate KV20 asby the setserew 31.

f l The loosebearingfor shaft 12 ormed'in the; 'frame @.eomprises a'bore v35 having a diameter slightlylarger than the diameter of the said shaft. A looking pin 36 locatedv transversely ofls'a-id-,bore' 35 and extending partiallyyvithin the upper portion thereof ooaots With a circumferential groove 37 l0-. cated near the end 38 of the shafto12 and thus serves to prevent longitudinaldisplacement ofthe said shaft. f

The operation of the machine is as follows; Supposing abe'lt. of 51A), inches in Width Aafter continued usey has Vbecome nicked,

out, or otherwiseinjured along the edges but has a bodyportion Whiohis still good. Furtherl suppose there is use, or need, for a belt of say Afl'l/fgvinohes in Width. In such a case the straightdge member 26 would be clamped to the plate 20 at a scale marking which would correspond to thenumeral 5 end of the belt would be advanced towardA the feed rolls 10 and 11. Upon turning the handle 8 the feed rolls would takehold of the belt and upon continued turning of the handle the belt would be fed through the machine.

As the belt is forcedthrough the machine, however, the knife or cutter 21 slits the belt and thereby cuts a strip therefrom. After passing the 51/2 inch belt through the machine the cutter 21 will have cut olf one of the injured edges an-d so produced a belt of 5 inches in width provided with one good edge but still having one of the original injured edges. Y

The straight-edge member 2G is then reset and clamped to the plate 2O at such a scale marking as would position the said straight-edge a distance of 411/2 inches from the cutter 21. Thenthe belt is vagain passed through the machine but this time the good edge is in contactr with the member 26, thus pe'rmittingthe remaining injured edge of the belt to be trimmed off bythe cutter, and

so producing a belt ,of 4% inches width withA good edges. V

It will be observed that the guide 16 for the shaft 12 does'not extend below the low- Vermost portion of the upper feed roll 11, and it will be further observed that the feed roll 11 may be raised to accommodate belts through the device the weight ofthe shaftv -12 will cause the teeth of gear 13 to be fully in mesh with the teeth of the driving gear 7, and the locking pin 36 will occupy fully the groove 37 of said shaft 12. Stated in other words the downward pressure exerted upon the end of shaft 12 carrying the knurled feed roll 11 will be transmitted through the gears 7 and 13 acting as a fulcrum to the end 38 of the said shaft and there create an equal and opposite upward pressure against the locking pin 36.

1When a belt is introduced to the machine and the knurled feed rolls 10 and l1 take hold and propel the said belt through the machine, then the upper roll 11 and consequently the -end of the attached shaft 12 will be raised approximately the thickness of said belt. It will be seen that provision must be made for this shaft displacement and therefore the bore 35 is made slightly larger than the diameter of the shaft 12 journaled therein. This loose .bearing ,iis not however, so large that the locking pin 36 will not at all times engage a portion of the circumferential groove 37. Y

or trimming knives heretofore when used with or without straight edges as guides has caused considerable difficulty, loss of time, and generally required the services of two shop employees. At best, a belt trimmed in the old way was a laborious task. With the aid of this simple mechanism, on the other hand, a belt of any material such as leather, canvas, rubber, balata, etc. can bequickly and easily trimmed by a single employee. Further, the completely trimmed belt will be true and more neatly formed as a result of the use of this mechanism.

Itis obvious that those skilled in the art may vary the details of construction as well as the arrangement of parts without departing from the spirit of the invention, and therefore it is not `desired to be limited to the foregoing disclosure except as may be required by the claims. -Y

What is claimed is:

1. In a machine for trimming belts the combination of a cutter; ka stationary driving shaft; a pivoted ldriven shaft geared thereto between said pivot and said cutter; means to propel a belt past said cutter; and

It has been found that the use of cutting means to vary the pressure of' sai-d propelling means.

2. In a machine for trimming belts the combination of a cutter; a 'driving shaft; a tiltable shaft geared thereto between said pivot and said cutter; means comprising a pair of feed rolls carried by said shafts to propel a belt past said cutter; and means to vary the pressure of said propelling means.

3. In a machine for trimming belts the combination of a cutter; a driving shaft; a tiltable shaft geared thereto between said vpivot and said cutter; means including a feed roll mounted on each of said shafts to propel a belt past said cutter; and means to vary the pressure of said propelling means.

4. In a machinev for trimming belts the combination of a frame; a shaft sup-ported at both ends in said frame; a tiltable shaft loosely journale'd at one end only in said frame; a cutter; means to propel a belt past said cutter; means to guide said belt to said propelling means; means to drive said propelling means; and means to vary the pressure of the propelling means.

5. In a machine for trimming belts the combination of a frame; a shaft supported at both ends in said frame; a tiltable shaft loosely j ournaled at one end only in said frame; a cutter; means carried by said shafts to propel a belt past said cutter; means to guide said belt to said propelling means; means to drive said propelling means; and means to vary the pressure of the propelling means. 4

6. In a machine for trimming belts the combination of aframe; a shaft supported at both ends in said frame; a tiltable shaft loosely journaled at one end only in said frame; a cutter; means to propel a belt past said cutter; means to guide said beltl to said propelling' means; means to drive said propelling` means; and means supported by the 'free end of the tiltable shaft to vary the pressure of the propelling means.

7. In a machine for trimming belts the combination of a frame; a power shaft supported in said frame; a. lower feed roll mounted on said shaft; a tiltable second shaft loosely journaled at one end only in said frame; an upper feed roll mounted on said second shaft; means supported by thev` free end of said second shaftto force' said a cutter; means to guide a belt to said cutter; and means to operate said feed rolls to propel the belt past said cutter.

8. In aA machine for trimming belts the combination of a frame; a table .provided With a slot supported by said frame; a power shaftsupported in said frame; a

lower feed roll mounted on said shaft; a tiltable second shaft loosely journaled at onev operate said feed rolls to propel the belt past said cutter.

tures.

. ALEC J. GERRARD. LEROY F. HINTZ.

CSI

In testimony whereof We affix our signa- 

